Determining stiffness
The configuration of some application types includes the definition of the parameter "Spring stiffness between tower and trolley". If an application type is used that does not require this parameter, you can skip this step.
If you do not know these values, they can be determined from the signal waveform of the oscillating system by entering certain measured values in the configuration menu in the respective setting fields for "Support for parameter determination".
- Record the amplitudes of the oscillating system e.g. by means of a video recording at the point of greatest oscillation. If there is enough torque back to the motor from the oscillating mass, a scope recording of the torque can also be used.
No. | Field in the configuration menu |
|---|---|
[20] | Oscillation amplitude (1st peak) |
[21] | Oscillation amplitude (2nd peak) |
[22] | Oscillation period (time between 1st and 2nd oscillation amplitude) |
- Enter the determined measured values (see diagram) into the corresponding setting fields in the configuration menu "Support for parameter determination".
- The values "Damping ratio between tower and horizontal drive" and "Spring stiffness between tower and horizontal drive" are calculated and used directly for anti-sway control.
- The natural frequency, resonance frequency and "Deflection at lifting height" are determined for plausibility checks against reality and design calculations.
- Carry out a plausibility check of the calculated values together with the data provider.
